CN218957651U

CN218957651U - Residual current operated circuit breaker

Info

Publication number: CN218957651U
Application number: CN202222878401.XU
Authority: CN
Inventors: 谢文萱; 单小龙; 葛伟骏
Original assignee: Shanghai Chint Intelligent Technology Co Ltd
Current assignee: Shanghai Chint Intelligent Technology Co Ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-05-02
Anticipated expiration: 2032-10-31

Abstract

The utility model provides a residual current operated circuit breaker, includes the casing and sets up binding post and test circuit in the casing respectively, test circuit includes test resistor and torsional spring, the binding post includes the wiring board, and the wiring board is equipped with the draw-in groove, the torsional spring includes first connecting rod and second connecting rod to and connect the screw portion between first connecting rod and second connecting rod, first connecting rod with test resistor is connected, the second connecting rod is inserted in the draw-in groove, need not pass through wire welding with test resistor and wiring board, just can realize test resistor and wiring board electrical connection, the problem of welding point rupture can not appear, moreover can simplify assembly process, improve the efficiency of assembly.

Description

Residual current operated circuit breaker

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to a residual current operated circuit breaker.

Background

During normal use of the residual current operated circuit breaker, the residual current operated circuit breaker is required to perform leakage simulation test operation every time at intervals, and after a test button is pressed down, the product can simulate leakage operation to cut off a circuit so as to ensure normal use of a leakage protection function of the product. However, the conventional test circuit is usually formed by welding parts such as a wiring board, a wire, a resistor, etc., and the wire is liable to swing to cause breakage of a welding point during the assembly process.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide a residual current operated circuit breaker with convenient assembly and high reliability.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a residual current operated circuit breaker, includes the casing and sets up binding post and test circuit in the casing respectively, test circuit includes test resistance and torsional spring, binding post includes the wiring board, and the wiring board is equipped with the draw-in groove, the torsional spring includes first connecting rod and second connecting rod to and connect the screw portion between first connecting rod and second connecting rod, first connecting rod with test resistance connects, the second connecting rod is inserted in the draw-in groove.

Preferably, a contact wall is arranged in the clamping groove, a contact section of the second connecting rod is pressed on the contact wall and in limit fit with the contact wall, the second connecting rod is provided with a bending section, the bending section is connected with the contact section, and the axis of the contact section is parallel to the contact wall.

Preferably, the second connecting rod comprises a connecting section, a contact section and a supporting section connected between the connecting section and the contact section, the connecting section is connected with the spiral part, the contact section is in limit fit with the wiring board, and a supporting table in limit fit with the supporting section is arranged in the shell.

Preferably, the contact section and the connecting section are arranged at an oblique angle, and the contact section is connected with the connecting section through a bending section.

Preferably, the clamping groove comprises a contact wall and a side inner wall which are oppositely arranged, and the bottoms of the contact wall and the side inner wall are connected through a bottom inner wall.

Preferably, one end of the contact wall far away from the bottom inner wall is connected with a guide surface, and the guide surface and the contact wall are arranged at an oblique angle.

Preferably, the first connecting rod is connected with the test resistor through a riveting piece.

Preferably, the space in the shell comprises a middle cavity, an upper cavity and two side cavities, wherein the upper cavity and the two side cavities are respectively communicated with the middle cavity, the two side cavities are relatively arranged on two sides of the middle cavity, the spiral part and the wiring terminal of the torsion spring are arranged in one side cavity, the test resistor is arranged in the upper cavity, and the first connecting rod of the torsion spring extends into the upper cavity to be connected with the test resistor.

Preferably, the shell comprises two half shells which are oppositely arranged, the two half shells are connected through a connecting piece after being buckled to form the shell, a connecting table is arranged in the shell, a connecting hole matched with the connecting piece is formed in the connecting table, the connecting table is connected with the side wall of the shell, a V-shaped limit groove is formed between the side surface of the connecting table and the side wall of the shell, a fixing column is arranged on the inner side of the limit groove, and a spiral part of the torsion spring is rotatably sleeved on the fixing column.

Preferably, the test loop comprises a test button, a zero sequence transformer L pole winding, a supporting piece, a bimetal element, a flexible connection, a moving contact, a contact spring, a first spring, a second spring, a test resistor, a torsion spring and an N pole wiring board, wherein the N pole wiring board, the zero sequence transformer L pole winding, the supporting piece, the bimetal element, the flexible connection and the moving contact are sequentially and electrically connected, one end of the contact spring is provided with a first spring arm, the first spring arm is fixedly supported on the moving contact, the other end of the contact spring is provided with a second spring arm which is in contact with a contact part of the second spring to form electric connection, the second spring is electrically connected with the first spring, the first spring is electrically connected with the test resistor, the other end of the test resistor is connected with the wiring board 21 serving as the L pole wiring board through the torsion spring, and the test button can enable the test loop to be closed.

Preferably, the centre bore of the second spring is rotatably mounted on the housing, the first spring is rotatably mounted on the housing, one end of the first spring is provided with a third spring arm, the third spring arm is fixedly supported on the housing, the other end of the first spring is provided with a fourth spring arm, the fourth spring arm is electrically connected with the test resistor, the second spring is provided with a second contact portion, and the second contact portion is electrically connected with a fifth spring arm of the first spring.

According to the residual current operated circuit breaker disclosed by the utility model, the test resistor 3 of the test circuit is connected with the wiring board 21 of the wiring terminal 2 through the torsion spring 4, the first connecting rod 41 is connected with the test resistor 3, the first connecting rod 41 can be in a fixed state, the second connecting rod 42 of the torsion spring 4 is pressed on the clamping groove 22 of the wiring board 21 under the action of the elasticity of the torsion spring 4 and is limited by the clamping groove 22, the test resistor 3 and the wiring board 21 are not required to be welded through a wire, the test resistor 3 and the wiring board 21 can be electrically connected, the problem of breakage of welding points does not occur, the assembly process can be simplified, and the assembly efficiency is improved.

In addition, connect between contact section and linkage segment through the section of bending, make the axis of contact section with contact wall parallel arrangement not only can make the contact section by the hold-down force F of compressing tightly on the contact wall set up perpendicularly with the contact wall, can reduce the arm of force of contact position by L1 into L2 moreover, and then increase the size of hold-down force F, can avoid contact pressure not enough, guarantee electrical connection's reliability.

Drawings

Fig. 1 is a schematic diagram of a residual current operated circuit breaker according to the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 in accordance with the present utility model;

FIG. 3 is a schematic view of the construction of the first torsion spring of the present utility model;

FIG. 4 is a schematic view of the structure of the patch panel of the present utility model;

FIG. 5 is a schematic view of the construction of the second torsion spring of the present utility model;

FIG. 6 is a cross-sectional view A-A of FIG. 1 in accordance with the present utility model;

FIG. 7 is a schematic diagram of the construction of a test circuit of the present utility model;

FIG. 8 is a schematic view of the structure of the contact spring of the present utility model;

FIG. 9 is a schematic view of the structure of a second spring of the present utility model;

fig. 10 is a schematic view of the structure of the first spring of the present utility model.

Detailed Description

The following is a further description of embodiments of the residual current operated circuit breaker according to the utility model, given by way of example with reference to the accompanying drawings. The residual current operated circuit breaker of the present utility model is not limited to the description of the following embodiments.

As shown in fig. 1 to 4, the residual current operated circuit breaker of the present utility model includes a housing 1, and a connection terminal 2 and a test circuit respectively provided in the housing 1; the test circuit comprises a test resistor 3 and a torsion spring 4, the wiring terminal 2 comprises a wiring board 21, the wiring board 21 is provided with a clamping groove 22, the torsion spring 4 comprises a first connecting rod 41 and a second connecting rod 42, and a spiral part 43 connected between the first connecting rod 41 and the second connecting rod 42, the first connecting rod 41 is connected with the test resistor 3, the second connecting rod 42 is inserted into the clamping groove 22, and the elasticity of the torsion spring 4 enables the second connecting rod 42 to be pressed in the clamping groove 22 and limited by the clamping groove 22.

As shown in fig. 7-10, the test circuit includes a test button 52, a zero sequence transformer L pole winding 36, a supporting member 35, a bimetal element 39, a flexible connection 38, a moving contact 31, a contact spring 32, a first spring 33, a second spring 34, a test resistor 3, a torsion spring 4, and an N pole wiring board 37, where the wiring board 21 is an L pole wiring board, the N pole wiring board 37, the zero sequence transformer L pole winding 36, the supporting member 35, the bimetal element 39, the flexible connection 38, and the moving contact 31 are sequentially electrically connected, one end of the contact spring 32 is provided with a first spring arm 321, the first spring arm 321 is fixedly supported on the moving contact 31, the other end of the contact spring 321 is provided with a second spring arm 322, the second spring arm 322 is in contact with a contact portion 342 of the second spring 34 to form an electrical connection, the second spring 34 is electrically connected with the first spring 33, the first spring 33 is electrically connected with the test resistor 3, and the other end of the test resistor 3 is connected with the wiring board 21 as an L pole wiring board via the torsion spring 4. Preferably, the center hole of the second spring 34 is rotatably mounted on the housing 1, the center hole of the first spring 33 is rotatably mounted on the housing 1, one end of the first spring 33 is provided with a third spring arm 332, the third spring arm 332 is fixedly supported on the housing 1, the other end of the first spring 33 is provided with a fourth spring arm 333, the spring force of the fourth spring arm 333 acts on and is electrically connected with the test resistor 3, the second spring 34 is provided with a second contact part 344, the second contact part 344 can be in contact with and form electrical connection with the fifth spring arm 331 of the first spring 33 under the driving of the handle, the first connecting rod 41 of the torsion spring 4 is electrically connected with the other end of the test resistor 3, the second connecting rod 42 is connected with the wiring board 21 serving as an L-pole wiring board, the test button 52 can drive the contact part 342 to be in contact conduction with the spring 32 when being pressed, and if the second contact part 344 is in contact conduction with the first spring 33, the test circuit is closed, and then a leakage test signal is generated.

As shown in fig. 1, the space in the housing 1 includes a middle cavity 11, an upper cavity 12 and two side cavities 13, which are respectively communicated with the middle cavity 11, the two side cavities 13 are oppositely disposed at two sides of the middle cavity 11, the spiral part 43 of the torsion spring 4 and the connection terminal 2 are both disposed in one of the side cavities 13, the test resistor 3 is disposed in the upper cavity 12, and the first connecting rod 41 of the torsion spring 4 extends into the upper cavity 12 to be connected with the test resistor 3.

Further, the casing 1 includes two half-shells that set up relatively, and two half-shells link to each other through connecting piece (not shown in the figure) after the lock constitutes casing 1, be equipped with the connection platform 14 in the side cavity 13 of casing 1, be equipped with on the connection platform 14 with connecting piece complex connecting hole 15, the connection platform 14 meets with the lateral wall of casing 1 to form V type spacing groove 16 between the lateral surface of connection platform 14 and the lateral wall of casing 1, the inboard of spacing groove 16 is equipped with fixed column 17, the rotatable cover of screw 43 of torsional spring 4 is on fixed column 17. After the spiral part 43 is sleeved on the fixed column 17, the side surface of the connecting table 14 and the side wall of the side cavity 13 can play a role in positioning or pre-positioning the torsion spring 4.

As shown in fig. 1 and 6, the second connecting rod 42 includes a connecting section 44 and a contact section 45, and a supporting section 46 connected between the connecting section 44 and the contact section 45, the connecting section 44 is connected with the spiral portion 43, the contact section 45 is in limit fit with the wiring board 21, and the supporting table 18 in limit fit with the supporting section 46 is arranged in the housing 1, so as to avoid that the supporting section 46 and the contact section 45 are pressed and incline downwards, and contact between the contact section 45 and the wiring board 21 is affected.

As shown in fig. 4 and 5, the clamping groove 22 is provided with a contact wall 23, when the second connecting rod 42 is pressed in the clamping groove 22 and limited by the clamping groove 22, a contact section 45 of the second connecting rod 42 is pressed on the contact wall 23 and is in limit fit with the contact wall 23, the second connecting rod 42 is provided with a bending section 47, the bending section 47 is connected with the contact section 45, and the axis of the contact section 45 is parallel to the contact wall 23. Preferably, the contact section 45 is disposed at an oblique angle to the connection section 44, and the contact section 45 is connected to the connection section 44 by a bending section 47.

The bending section 47 is connected between the contact section 45 and the connecting section 44, so that the axis of the contact section 45 is parallel to the contact wall 23, the pressing force F for pressing the contact section 45 on the contact wall 23 can be perpendicular to the contact wall 23, the force arm of the contact position can be reduced from L1 to L2, the pressing force F is further increased, the contact pressure deficiency can be avoided, and the reliability of electrical connection is ensured.

As shown in fig. 4, the slot 22 on the wiring board 21 is U-shaped and includes two opposite inner walls, which are respectively a contact wall 23 and a side inner wall 24 that are opposite, and the bottoms of the contact wall 23 and the side inner wall 24 are connected by a bottom inner wall 25.

Further, one end of the contact wall 23 far away from the bottom inner wall 25 is connected with the guiding surface 26, the guiding surface 26 and the contact wall 23 are in an oblique angle, the guiding surface 26 in an oblique angle can be inserted into the side surface of the second connecting rod 42 more easily, the second connecting rod 42 can be inserted into the clamping groove 22 conveniently, the assembly difficulty can be reduced, in particular, the torsion spring 4 can be firstly installed into the shell 1, then the assembled connecting terminal 2 is integrally installed into the shell 1, and the second connecting rod 42 can be automatically inserted into the clamping groove 22 in the assembly process.

Further, the first connecting rod 41 is connected to the test resistor 3 via a rivet 6.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims

1. Residual current operated circuit breaker, including casing (1) and binding post (2) and test circuit that set up respectively in casing (1), its characterized in that: the test circuit comprises a test resistor (3) and a torsion spring (4), the wiring terminal (2) comprises a wiring board (21), the wiring board (21) is provided with a clamping groove (22), the torsion spring (4) comprises a first connecting rod (41) and a second connecting rod (42), and a spiral part (43) connected between the first connecting rod (41) and the second connecting rod (42), the first connecting rod (41) is connected with the test resistor (3), and the second connecting rod (42) is inserted into the clamping groove (22).

2. The residual current operated circuit breaker according to claim 1, characterized in that: the clamping groove (22) is internally provided with a contact wall (23), a contact section (45) of the second connecting rod (42) is pressed on the contact wall (23) and is in limit fit with the contact wall (23), the second connecting rod (42) is provided with a bending section (47), the bending section (47) is connected with the contact section (45), and the axis of the contact section (45) is parallel to the contact wall (23).

3. The residual current operated circuit breaker according to claim 1, characterized in that: the second connecting rod (42) comprises a connecting section (44) and a contact section (45), and a supporting section (46) connected between the connecting section (44) and the contact section (45), wherein the connecting section (44) is connected with the spiral part (43), the contact section (45) is in limit fit with the wiring board (21), and a supporting table (18) in limit fit with the supporting section (46) is arranged in the shell (1).

4. A residual current operated circuit breaker according to claim 3, characterized in that: the contact section (45) and the connecting section (44) are arranged at an oblique angle, and the contact section (45) is connected with the connecting section (44) through the bending section (47).

5. The residual current operated circuit breaker according to claim 2, characterized in that: the clamping groove (22) comprises a contact wall (23) and a side inner wall (24) which are oppositely arranged, and the bottoms of the contact wall (23) and the side inner wall (24) are connected through a bottom inner wall (25); the end of the contact wall (23) far away from the bottom inner wall (25) is connected with a guide surface (26), and the guide surface (26) is arranged at an oblique angle with the contact wall (23).

6. The residual current operated circuit breaker according to claim 1, characterized in that: the first connecting rod (41) is connected with the test resistor (3) through a riveting piece (6).

7. The residual current operated circuit breaker according to claim 1, characterized in that: the space in casing (1) includes well cavity (11) to and go up cavity (12) and two side cavity (13) with well cavity (11) intercommunication respectively, two side cavity (13) set up relatively in the both sides of well cavity (11), spiral part (43) and binding post (2) of torsional spring (4) all set up in one of them side cavity (13), test resistor (3) set up in last cavity (12), first connecting rod (41) of torsional spring (4) stretch into in last cavity (12) be connected with test resistor (3).

8. The residual current operated circuit breaker according to claim 1, characterized in that: the shell (1) comprises two half shells which are oppositely arranged, the two half shells are connected through a connecting piece after being buckled to form the shell (1), a connecting table (14) is arranged in the shell (1), a connecting hole (15) matched with the connecting piece is formed in the connecting table (14), the connecting table (14) is connected with the side wall of the shell (1), a V-shaped limit groove (16) is formed between the side surface of the connecting table (14) and the side wall of the shell (1), a fixing column (17) is arranged on the inner side of the limit groove (16), and a spiral part (43) of the torsion spring (4) is rotatably sleeved on the fixing column (17).

9. The residual current operated circuit breaker according to claim 1, characterized in that: the test loop comprises a test button (52), a zero sequence transformer L pole winding (36), a supporting piece (35), a bimetal element (39), a flexible connection (38), a moving contact (31), a contact spring (32), a first spring (33), a second spring (34), a test resistor (3), a torsion spring (4) and an N pole wiring board (37), the zero sequence transformer L pole winding (36), the supporting piece (35), the bimetal element (39), the flexible connection (38) and the moving contact (31) are sequentially and electrically connected, one end of the contact spring (32) is provided with a first spring arm (321), the first spring arm (321) is fixedly supported on the moving contact (31), the other end of the contact spring (32) is provided with a second spring arm (322) and a contact part (342) of the second spring (34), the second spring (34) is electrically connected with the first spring (33), the first spring (33) is electrically connected with the test resistor (3), and the other end of the test resistor (3) is connected with the wiring board L pole wiring board through the torsion spring (4), so that the test loop can be closed.

10. The residual current operated circuit breaker according to claim 9, characterized in that: the centre bore rotation of second spring (34) is installed on casing (1), first spring (33) is rotated and is installed on casing (1), and one end of first spring (33) is equipped with third spring arm (332), and third spring arm (332) fixed stay is on casing (1), and the other end of first spring (33) is equipped with fourth spring arm (333), fourth spring arm (333) and test resistor (3) electrical connection, second spring (34) are equipped with second contact portion (344), and second contact portion (344) are connected with fifth spring arm (331) of first spring (33) electrical connection.